Problema Solution
A 20 oz alloy of platinum that costs $220 per ounce is mixed with an alloy that costs $400 per ounce. How many ounces of the $400 alloy should be used to make an alloy that costs $300 per ounce?
Answer the question: 16 oz
Answer provided by our tutors
Let x represent the ounces of the $400 alloy used for the mixed, x>0
20*220 + x*400 = 300(20 + x)
........
........
x = 16 oz
16 ounces of $400 alloy should be used.